AutoCodes – Chevrolet – P1B46 Chevrolet

P1B46 Chevrolet Code - Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1B46 Chevrolet indicates Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 978

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B46 Chevrolet Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1B46 Chevrolet - Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage - AutoCodes.com — P1B46 Chevrolet Code - Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B46 Chevrolet?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P1B46 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1B46 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1B46 Chevrolet Code

1. What are the common symptoms of OBDII code P1B46 in a Chevrolet hybrid/electric vehicle?

The common symptoms of code P1B46 include reduced power output, poor acceleration, and a noticeable decrease in overall vehicle performance.

2. What could cause the Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage code in a Chevrolet vehicle?

The code P1B46 is typically triggered by issues such as a faulty high voltage battery, damaged battery cells, loose connections, or a malfunctioning battery management system.

3. How serious is the P1B46 code in a Chevrolet hybrid/electric vehicle?

The P1B46 code should be addressed promptly to prevent further damage to the vehicle's high voltage battery and ensure optimal performance of the hybrid/electric system.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with the P1B46 code present?

It is not recommended to continue driving your vehicle with the P1B46 code active, as it can lead to further damage to the high voltage battery and potentially compromise the safety and performance of the vehicle.

5. What are some DIY repair tips for addressing the Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage code in a Chevrolet?

DIY repair tips may include checking and tightening battery connections, inspecting the high voltage battery for physical damage, and ensuring proper ventilation around the battery pack.

6. How can I reset the OBDII code P1B46 in my Chevrolet hybrid/electric vehicle?

Resetting the P1B46 code can be done using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes before reconnecting it. However, it's important to address the underlying issue causing the code before resetting it.

7. Is it safe to clear the P1B46 code and ignore it in my Chevrolet hybrid/electric vehicle?

Clearing the P1B46 code without addressing the underlying issue is not recommended, as it may lead to more severe problems in the high voltage battery system and compromise the safety and performance of the vehicle.

8. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage code in a Chevrolet?

The cost of repairing the P1B46 code can vary depending on the specific issue causing the code, but it may involve expenses related to diagnostic procedures, parts replacement, and labor costs.

9. Can a local mechanic or dealership service center address the P1B46 code in a Chevrolet hybrid/electric vehicle?

Yes, a qualified mechanic at a dealership or an experienced hybrid/electric vehicle technician can diagnose and repair the P1B46 code in a Chevrolet vehicle using specialized tools and knowledge.

10. How often does the P1B46 code occur in Chevrolet hybrid/electric vehicles, and is it preventable?

The occurrence of the P1B46 code in Chevrolet hybrid/electric vehicles can vary, but regular maintenance, proper care of the high voltage battery system, and timely addressing of any warning signs can help prevent this code from appearing.